10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Australia's Great Barrier Reef is 1,250 miles long!
45
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
Israel's Dead Sea is 1,312 feet below sea level.
48
The Caspian Sea is also classed as the world's largest lake.
52